Garth Brooks is one of the biggest acts in the world. His US Tour sold out venues across the country, multiple nights, since he went back out on the road. Now Garth is getting ready for his next tour -- and he says it will be the biggest thing he's ever done.

According to FOX News, in an interview on the "Bobby Bones Show" Brooks revealed he's been "living in the studio" for the past six months, taking frequent writing appointments and working hard on new music. One of his collaborators is our ol' pal Randall King.

This isn't the first time Brooks has spoken of King.

In May -- soon after the release of Randall King's self-titled album -- on his' 'Live from Studio G' Garth gave his fans fans a glowing review of the album and the singer. "This kid is what country music is all about," Brooks proclaimed as he answered fans' questions on his live Facebook broadcast.

But this is the first we've heard about the two collaborating.

Garth says they wrote a song together called "The Road I'm On" that Brooks revealed will "be the opening song for the tour. It's just one of those songs that's all about appreciation. It describes the tour really well."

King is obviously excited. He told us via text, "I don't think it'll be the single, but it's a badass tune. It's been a wild few months."